Feed nut sleeve for drills



April 17, 1951 MACKENSEN 2,549,105

FEED NUT SLEEVE FOR DRILLS Filed Dec. 1, 1948 f/vyE/v oQ 1 7 HAEOLDTMACKENSEIN,

HTT Y.

Patented Apr. 17 951 FEED NUT Harold T. Mackensen, Columbus, Ohio, assignori I to The J eifrey Manufacturing Company, aco'r poration of Ohio Application December 1, 1'948,"SerialNo. 62,8251 f This invention relates to a feed nut sleeve for drills, such as mine drills.

An object of the invention is to provide im proved mechanism of the above mentioned type in which a feed nut sleeve is provided with one or more flat holding springs which will hold the sleeve on the two separable halves of a split feed nut.

Other objects of the invention will appear hereinafter, the novel features and combinations being set forth in the appended claim.

In the accompanying drawings,

Fig. l is a side elevational view of a drill mounted on a mine jack including the improved feed nut sleeve of my invention; I

Fig. 2 is a perspective view of the improved feed nut sleeve, with parts broken away;

Fig. 3 is a front elevational view of the sleeve,

with parts broken away and in section; and

Fig. 4 is an elevational view of a, feed nut with which the improved sleeve cooperates.

The patent to O. B. Jones, No. 2,090,330, dated August 17, 1937, illustrates in considerable detail a drilling mechanism including a split feed nut which follows generally the construction of the drill and feed nut with which the improved feed nut sleeve of my invention cooperates, except for certain modifications in the feed nut which are specifically illustrated in Fig. 4 of the drawings and mentioned hereinafter.

In Fig. 1 there is illustrated a complete drilling mechanism In adjustably mounted on an adjustable mine jack H, the complete assembly bein shown ready for operation adjacent a room face in a mine. The drilling mechanism includes a threaded feed shaft I2 towhich is attached a removable drill I3. Drilling is, of course, efiected by rotating the shaft I2 and the drill l3 and simultaneously feeding the two forward to drill a hole in the mine room face, while said drilling mechanism In is supported and anchored by the mine jack As disclosed in detail in the above mentioned patent to Jones, the feeding of the shaft I2 is controlled by a split feed nut. Such a split feed nut is seen at M in Fig. 4 of the drawings. It includes a pair of pivotally connected halves which together in general constitute a cylindrical member I5 having a peripheral groove I6 intermediate the ends, thereof.

Feed nut sleeve H is adapted to slide over the two halves of the feed nut M and clamp them in operating relation with the shaft I2. Said feed nut sleeve I! may be removed by simply giving it a jerk along the axis of the feed nut I4 and shaft 1 claim. (c1. est-4hr I2 which will perrrlit'the two halves of the feed nut 14 to separate, thus freeing the (shaft I2 from the controlling influence thereof.

The particular 'featureof my invention is the construction of the feed nut sleeve I which provides for its ready and relatively easy sliding over the feed nut I4 to clamp the two halves thereof in operative relation with the shaft I2 while insuringits bein frictionally held in position and providing for the ready removal thereof without requiring any tools whatever.

Said feed nut sleeve includes a cylinder |8 which at opposite ends is provided with reinforcing upwardly extending disc flanges l9 and 2|] which are preferably welded to the outer opposite extremities of said cylinder I8. Intermediate its ends the cylinder I8 is provided with a pair of diametrically spaced alined slots 2| preferably formed by milling along diametrically opposite positions of the cylinder l8, the axis of the slots 2| being perpendicular to the axis of the cylinder. I8. Stated another way, the side edges of the slots 2| are parallel with the planes which pass through the ends of the cylinder l8.

Adjacent each of the slots 2| and extending into the cylinder I8 is a flat metal spring 22. The slots 2| obviously provide windows or openings which provide for the fiat springs 22 extending into the interior of the cylinder IS, th two springs 22 being diametrically opposite each other. To hold the springs 22 in their positions and to provide recesses which eifect this holding function there is a circumscribing ring 23 rigidly attached to the exterior of the cylinder l8 which surrounds it and cover up ,the outside of each of said slots 2|. As clearly illustrated in Fig. 3 of the drawings, the ring 23 cooperates with the cylinder l8 adjacent each slot 2| to provide a recess which Will lock the spring 22 in position without requiring it to be rigidly attached to said cylinder I8.

To clamp the two halves of the feed nut I4 in position it i only necessary to slide the feed nut sleeve I! over said feed nut I4. When this is done the flat springs 22 will be received in the peripheral groove l6 and frictionally prevent unauthorized removal of said feed nut sleeve ll. However, by the simple expedient of an operator grasping the feed nut sleeve I! with his hand and jerking it along the axis of the feed nut I4 and shaft l2 it is possible to disengage the fiat springs 22 from the groove I6, thus removing the feed nut sleeve This particular construction of the feed nut sleeve has been found to be very spring ends.

simple and eificient and free from some of the difilculties encountered by previous devices.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claim hereto appended, and applicant therefore wishes not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of the invention, what it is desired to secure by Letter Patent of the United States is:

A feed nut sleeve for a drill'includin'g a cylinder adapted to slide over and lock a split feed nut, means providing an elongated slot in the inner peripheral surface of said cylinder, the axis of 7 said slot being perpendicular to the axis of said cylinder, ring means=attached to said cylinder I and covering the entire exterior of saidv slot, and a spring in said slot locked to said cylinder in recesses at opposite ends thereof and extending into the interior of said cylinder intermediate the HARoLD 'r. MACKENSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain Aug. 30,1906 

